Population imbalance and pairing in the BCS-BEC crossover of three-component ultracold fermions

Journal Article · Wed Dec 15 04:00:00 EST 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.063615· OSTI ID:21528938

Ozawa, Tomoki; Baym, Gordon ^[1]

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1. Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801 (United States)

We investigate the phase diagram and the BCS-BEC crossover of a homogeneous three-component ultracold Fermi gas with a U(3)-invariant attractive interaction. We show that the system at sufficiently low temperatures exhibits population imbalance as well as fermionic pairing. We describe the crossover in this system, connecting the weakly interacting BCS regime of the partially population-imbalanced fermion pairing state and the BEC limit with three weakly interacting species of molecules, including pairing fluctuations within a t-matrix calculation of the particle self-energies.

• OSTI ID: 21528938
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
BOSE-EINSTEIN CONDENSATION
DIAGRAMS
ENERGY
FERMI GAS
FERMIONS
FLUCTUATIONS
INFORMATION
INTERACTIONS
MATRICES
MOLECULES
PAIRING INTERACTIONS
PHASE DIAGRAMS
S MATRIX
SELF-ENERGY
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
VARIATIONS